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Vladimir Putin's principal opponent Alexei Navalny has accused the Kremlin of being involved in a green dye attack which he said damaged his cornea.

Russian network REN-TV published a video of Thursday's attack on the opposition leader in which the face of the assailant is blurred.

The video, first broadcast on Friday, starts as Mr Navalny bends down and raises a hand to the right side of his face covered by the green substance believed to be the Soviet-era topical antiseptic known as "zelyonka.".

The attacker is filmed as he runs away from Mr Navalny and towards the camera, however in the broadcast video it's impossible to discern his face as it is heavily pixellated.

On Sunday, Mr Navalny suggested on Twitter that the video was leaked to the Kremlin-friendly private broadcaster by authorities and accused Russia's FSB (Russia's Federal Security Service) of involvement.

"They have no shame," Mr Navalny wrote in a tweet.

In a separate tweet, the politician posted the video and wrote: "Don't be shy. REN-TV publishes the zelyonka video. The best proof that FSB and AP [president's administration] are involved. Trademark style."

On Sunday posted a long post on his website in which he accused the security services of providing information about his movements to those who have carried out attacks against him.

"I have no doubt -- and my confidence is based on facts -- that the presidential administration organised this attack," he wrote.

The 40-year-old also said that his doctor believes the green liquid contained another substance that may have caused the the burn.

Mr Navalny added that he continues to apply eye drops every 15 minutes, and is receiving injections as well.

"We're fighting to ensure that the vision in the eye remains clear," Navalny said. "If it doesn’t work out (and that's a possibility, alas), then Russia will have a president with a stylish white eye."

On Monday he then published a photograph of vice-speaker of the State Duma Pyotr Tolstoy with "the man that splashed me with acid."

Mr Navalny is arguably Russia’s most popular opposition leader. He plans to run for president against Vladimir Putin, the incumbent, at elections next year.